Abidjan Air Quality Index (AQI)

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Abidjan, the economic capital of Ivory Coast, is strategically positioned on the southern coast of West Africa along the Ébrié Lagoon, which profoundly shapes its urban character and air quality dynamics. The city sprawls across a series of peninsulas and islands connected by bridges, creating a fragmented urban landscape that intensifies traffic congestion and associated vehicle emissions. Situated at low elevation near sea level, Abidjan's terrain is predominantly flat coastal plain, which limits natural ventilation and allows pollutants to accumulate, especially during periods of atmospheric stability. The city's location adjacent to the Gulf of Guinea influences local meteorology, with sea breezes that can disperse pollution but also bring maritime emissions from the bustling Port of Abidjan, one of West Africa's largest. To the north, the urban area transitions into the Vridi industrial zone, a major pollution source, while the surrounding region features a mix of peri-urban agriculture and tropical forest. This urban-rural gradient means that agricultural burning occasionally contributes to regional haze, though local industrial and transportation sources dominate. The Ébrié Lagoon itself can act as a moisture source that combines with pollutants to form haze, while the city's rapid, unplanned expansion has created dense neighborhoods with poor air circulation, exacerbating exposure to road dust and generator exhaust in areas with unreliable electricity.

Abidjan's air quality follows a distinct seasonal pattern driven by the West African monsoon, with pollution peaking during the dry season from November to February when meteorological conditions are most conducive to pollutant accumulation. During these months, the Harmattan wind brings dry, dusty air from the Sahara Desert, combining with local emissions from vehicles, industries, and waste burning to create persistent haze. Temperature inversions are common in the early morning, trapping pollutants near the ground, while reduced rainfall means less atmospheric cleansing. Sensitive groups such as children, the elderly, and those with respiratory conditions should limit outdoor activities during this period, especially in high-traffic areas like the Plateau business district. From March to May, the long rainy season begins, with increased precipitation that washes pollutants from the air, leading to improved air quality—this is the best time for outdoor activities. The short dry season from June to August sees moderate pollution levels, though sea breezes from the Gulf of Guinea provide some dispersion. From September to October, the short rainy season offers another respite, though humidity can combine with emissions to form secondary pollutants. Year-round, the city's equatorial location means high humidity often exacerbates the health impacts of pollution, making mask use advisable during peak months.